BASIS OF PRESENTATION AND NATURE OF OPERATIONS - Schedule of Adjustments for ASC 326 (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		$ 268	$ 1,606,219
Net deferred costs			(1,011)
Allowance for loan losses	$ (21,382)		(18,417)	$ (18,256)	$ (19,424)
Net portfolio loans	1,623,435	1,584,295	1,586,791
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			(2,496)
Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		217
Net portfolio loans		(2,496)
Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	1,644,817	1,578,810	1,578,943
Net deferred costs		0	(133)
Allowance for loan losses	(21,382)	(20,913)	(18,417)
Net portfolio loans	1,608,156	1,557,897	1,560,393
Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		(133)
Net deferred costs		133
Allowance for loan losses		(2,496)
Net portfolio loans		(2,496)
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	1,177,761		1,115,485
Allowance for loan losses	(17,313)		(13,095)	(13,285)	(13,744)
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			(3,734)
Commercial real estate | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	1,177,761	1,113,793	1,115,485
Commercial real estate | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		(1,692)
Residential first mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	86,416		91,120
Allowance for loan losses	(284)		(1,002)	(1,024)	(1,305)
Residential first mortgages | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			679
Residential first mortgages | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	86,416	92,710	91,120
Residential first mortgages | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		1,590
Residential rentals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	191,065		195,035
Allowance for loan losses	(1,546)		(2,175)	(1,361)	(1,413)
Residential rentals | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			586
Residential rentals | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	191,065	194,911	195,035
Residential rentals | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		(124)
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	30,649		35,590
Allowance for loan losses	(137)		(260)	(365)	(401)
Construction and land development | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			82
Construction and land development | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	30,649	35,502	35,590
Construction and land development | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		(88)
Home equity and second mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	26,445
Home equity and second mortgages | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	26,445	25,661	25,638
Home equity and second mortgages | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		23
Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	48,948		50,574
Allowance for loan losses	(319)		(582)	(1,012)	(1,222)
Commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			290
Commercial loans | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	48,948	50,512	50,574
Commercial loans | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		(62)
Consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	3,592		3,002
Allowance for loan losses	(73)		(58)	(29)	(20)
Consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			(2)
Consumer loans | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	3,592	3,015	3,002
Consumer loans | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		13
Commercial equipment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	64,662		62,499
Allowance for loan losses	(1,532)		(971)	$ (917)	$ (1,058)
Commercial equipment | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for loan losses			(483)
Commercial equipment | Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	64,662	62,706	62,499
Commercial equipment | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		207
U.S. SBA PPP
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans			27,276
U.S. SBA PPP | Non Portfolio Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans	15,279	26,398	27,276
Net deferred costs		0	(878)
Net portfolio loans	$ 15,279	26,398	$ 26,398
U.S. SBA PPP | Non Portfolio Loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		(878)
Net deferred costs		878
Net portfolio loans		0
Accounting Standards Update 2019-11 | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		51
Net portfolio loans		1,586,791
Accounting Standards Update 2019-11 | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		1,578,943
Net deferred costs		(133)
Allowance for loan losses		(18,417)
Net portfolio loans		1,560,393
Accounting Standards Update 2019-11 | Commercial real estate | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		1,115,485
Accounting Standards Update 2019-11 | Residential first mortgages | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		91,120
Accounting Standards Update 2019-11 | Residential rentals | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		195,035
Accounting Standards Update 2019-11 | Construction and land development | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		35,590
Accounting Standards Update 2019-11 | Home equity and second mortgages | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		25,638
Accounting Standards Update 2019-11 | Commercial loans | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		50,574
Accounting Standards Update 2019-11 | Consumer loans | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		3,002
Accounting Standards Update 2019-11 | Commercial equipment | Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		62,499
Accounting Standards Update 2019-11 | U.S. SBA PPP | Non Portfolio Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Gross loans		27,276
Net deferred costs		(878)
Net portfolio loans		$ 26,398